"We are confident in the accuracy of our story and stand by it 100 percent," Fox 31's Vice President of News Ed Kosowski said.

One part of the report said a grocery store receipt for garbage bags was found in Pattridge Park Open Space in Arvada, near where Jessica's body was found Oct. 10. Materasso said no receipts were found in that area or at Ketner Lake Open Space, near Jessica's Westminster home. He said employees at a King Soopers store have been interviewed, but "what led us to talk to them was related to a different tip."

He would not talk about forensic elements of the case, including the results of tests of DNA samples. Nor would he discuss anything about Jessica's backpack, which was discovered in the Superior neighborhood of Rock Creek three days after she disappeared.

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He did say what was described as hair by a person walking in a field about a mile from where Jessica's remains were found in Pattridge Park had been collected.

"We are asking people to understand that some of this needs to be withheld," Materasso said.

On Friday, police released a photo of a small wooden cross that could have been worn as a pendant. The cross has zig-zag markings on one side, and three distinct lines etched on the crossbar of the other side. Materasso said police have received many calls about that cross, but he asked people to focus on the unique markings, rather than on the size or shape of the object.

Hundreds of investigators are poring over evidence gathered during the days of searching that followed Jessica's disappearance as she walked to school in her Westminster neighborhood the morning of Oct. 5.

Last week, police renewed their calls for tips from people who might have information related to the Memorial Day attempted abduction of a jogger on Ketner Lake Open Space. That woman told police that a man attempted to cover her face with a chemical-soaked rag. She was able to escape.

She described her attacker as an 18 to 30 year-old light-skinned male with brown hair and a medium build, about 5-feet 6 inches to 5 feet 8 inches tall.

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